A. Kassim, Nabil. “Isolation and Diagnosis of Antagonistic Substances Against Potato Virus Y (PVY)”. Rafidain Journal of Science 22, no. 8 (December 1, 2011): 12–23. Accessed September 28, 2025. https://jamh.uomosul.edu.iq/index.php/rsci/article/view/47074.